Abstract: An air guiding device of a motor vehicle body includes a roof spoiler arranged on a rearward end of a roof of the motor vehicle body and above a rear window of the motor vehicle body. The roof spoiler includes a first spoiler portion extending along a transverse body axis (Y) and a second spoiler portion extending along a vertical body axis (Z). The roof spoiler includes an unmovable air guiding element and a movable air guiding element, which is movably received in an element opening of the unmovable air guiding element. For water drainage, the air guiding device includes a channel system, which is configured so as to receive and discharge water. The roof spoiler includes a spoiler entry opening. The channel system is configured so as to guide the water starting from the spoiler entry opening via the second spoiler portion to an environment.

Abstract: A redox flow battery, comprising a first electrolyte storage (1), a second electrolyte storage (2), an electrochemical cell connected to said first and second electrolyte storages (1, 2), wherein said electrochemical cell comprises a first half-cell and a second half-cell, wherein said first half-cell comprises a cathode (7), wherein said second half-cell comprises an anode (8), wherein said first and second half-cells are separated from each other by an ion exchange membrane (9), wherein said first electrolyte storage comprises an aqueous solution comprising an iron complex of a compound of formula I and stereoisomers of compound of formula I.

Abstract: A sensor arrangement having: a housing, a movement sensor, the movement sensor, being mounted on a bearing element connected to the housing; a position sensor; and a position transducer, the position sensor and the position transducer being arranged relative to each other in such a way that the movement of the movement sensor can be measured. The bearing element protrudes from the housing, or the position sensor and the position transducer are eccentric relative to the bearing element.

Abstract: A sensor arrangement having: a housing, a movement sensor, the movement sensor, being mounted on a bearing element connected to the housing; a position sensor; and a position transducer, the position sensor and the position transducer being arranged relative to each other in such a way that the movement of the movement sensor can be measured. The bearing element protrudes from the housing, or the position sensor and the position transducer are eccentric relative to the bearing element.